package com.bj.boot.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 登录检查
 * 在AdminWebConfig中配置拦截器要拦截或放行哪些请求
 */
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    //在AdminWebConfig中如果设置了放行路径，将不会进入此方法
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestURI = request.getRequestURI();
        log.info("拦截的请求路径{}",requestURI);

        //登陆检查
        HttpSession session = request.getSession();
        Object loginUser = session.getAttribute("loginUser");
        if(loginUser!=null){
            //放行
            return true;
        }
        //拦截,未登录,跳转到登录页,重定向也可以
        //request.setAttribute("msg","请先登录");
        //request.getRequestDispatcher("/").forward(request,response);
        session.setAttribute("msg","请先登录");
        response.sendRedirect("/");
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    }
}
